Types of anodizing:  Type I Anodizing - Chromic Acid also known as CAA or Chromic Acid Anodize.  Type II Anodizing - Sulfuric Acid or Sulfuric Acid Anodize SAA.  Type III Anodizing - Hard coat or  Hardcoat Anodizing HCA.
Architectural AnodizingAutomotive AnodizingMedical Components Anodizing, Stainless Steel Passivation, ElectropolishMilitary and Aerospace Anodizing

Walgren has more than 350 anodize systems worldwide

Walgren is a leader in plating waste treatment and recovery systems, also air pollution control for plating and finishing systems. Visit our Environmental Management page for details.

Automotive Anodize and Chromate

Vehicles manufactured by the "Big 3" Automakers - (along with #4 and 5 as well!) all contain components processed by Walgren anodizing systems.

Anodizing is an electrochemical conversion process that creates on the aluminum surface a hard, durable layer of aluminum oxide, enhancing its resistance to oxidation and corrosion and creating the ideal receptor for electrocolor, or adhesives.

Anodizing is favored by automakers because it is exceptionally durable, is unaffected by UV rays, will not chip, and offers exceptional color versatility, from black to bright dip to two-step coloring. Anodizing with Walgren technology is also highly repeatable, and ideal for large scale manufacturing.

Along with OEMs, tier 1 and tier 2 suppliers including Alcoa, Niagra Piston, Mahle Arvin Meritor, Bendix and Visteon value anodizing for its versatility, environmental advantages and ability to produce finishes that are distinctive and functional. They chose Walgren because our anodizing equipment has an unrivaled track record for reliability and performance, and our management and technical team is the most experienced in the world in the specialized field of automotive anodizing.

Walgren engineers and builds automotive anodizing systems for both continuous run and batch processing. Systems are widely used for "greenhouse trim" as well as sunroofs, roof racks, bumpers, brakes, housings and power train components.

Automakers have found that high quality anodizing protects aluminum finishes that were formerly compromised by car wash chemicals and road salt. Each process line is custom-engineered to the needs and production environment of the facility, but most lines begin with an alkaline clean, followed by acid or alkaline etch, electropolish or bright dip, desmut, Type II anodize, dye and seal.

Watch a short video on the operation of the anodize system built by Walgren Company for Jordan Extrusions.

Walgren Company has more experience with anodize technology than any company, worldwide.

Contact us for ideas and options regarding:

  • Type II, SAA Sulfuric Acid
  • Type III SAA Hard Coat
  • Chromate
  • Bright Dip
  • Electropolish



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Environmental equipment supplied by Walgren includes etch enclosures, bright dip enclosures, automatic and manual tank covers, hoist drip trays and enclosures, counterflow rinse systems, Etch - Chrome - Nickel recovery, scrubbers, mist eliminators, water c Koch Enterprises, Inc. Koch LLC Price-Koch Industries PriceWalgren, LLC